fight parentally from what we know and has been reported killed his older brother, suspect number one, tamerlan tsarnaev. he was hiding in a boat underneath a tarp after escaping on foot for the hours of the lockdown. michael, what i think is so fascinating is that there came a moment in the afternoon where i think it began to seem like the trail had been lost and how long could they keep the lockdown going? you can't keep people indoors indefinitely. it seemed like the condition was because this guy's on the loose you have to stay indoors. it was ironically letting people go back outside that led to him being captured. >> actually, although you can argue that had people been outside, he never would have been able to walk down that very quiet, small street and holed up in that boat. i was struck by, how did he get there? i walked down the street. it's off a main thoroughfare in watertown. it's a small street, a lot of homes on it. a bloody man, wounded man walking down that street in this situation would have caught the attention of anybody. and it may well be, actually, because everybody was i